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Using a Time Domain Reflectometry (TDR) probe (rod length 30 cm) to estimate the soil water content of a wet sandy loam soil. From the waveform we conclude that the two-way travel time of the electromagnetic wave along the rods in the soil is 10 ns (1 ns = 1?10-9 s). Calculate the volumetric wetness of the soil using the Topp and Davis (1985) equations. Approximate eqn is vv=c/(Er)^.5 Dielectric constant from inserting v=2L/t into above eqn. so Er=(ct/2L)^2
An 0.82 kg bucket full of water is being swung by a rope in a vertical circle of diameter 2.31 m. Compute the least speed a bucket must be moving so that the water doesn't fall out.
A 13.6 kg object on a horizontal frictionless surface is attached to a spring with k = 519 N/m. find the initial potential energy of the block-spring system
Jessica's weight is 540 newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540 N, then Jessica pulls on the Earth with a force of 540 newtons that acts in the opposite direction.though , if Jessica stumbles while rol..
Yusef pushes a chair of mass = 51.0 across a carpeted floor with a force (the subscript 'p' here is lowercase and throughout the question) of magnitude = 170 directed at = 35.0 below the horizontal. The magnitude of the frictional force between the c..
After a hard rain, you walk out into the parking lot and notice an oil sheen on top of a puddle of water. When viewed from directly above, What is the minimum thickness of the oil
A charge q= +5.80 uC is located in the center of a regular tetrahedron, Find the total electric flux through the tetrahedron, the electic flux through one face of the tetrahedron
how to calculate the average velocity between to minutes. Estimate how for you can throw a ball if you throw it in the following situations.
On a vacation flight, you look out the window of the jet and wonder about the forces exerted on the window.
The light bulb in the circuit has a resistance of 11 ohms and consumes 6.7 W of power as the 1.25 m long, What speed must the rod have if the current in the circuit is to be 0.65 A
Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ra..
A 528 Hz sound wave travels through a substance. What is the speed of sound in the substance
A playground merry-go-round has a radius of 4.60 {rm m} and a moment of inertia of 250 kg m^2 and turns with negligible friction about the vertical axle through its center.
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